FortiClient 5.6.6.1167

We just pushed out FortiClient and notice that computer goes to sleep/hibernate when users click on switching users on Windows 7.  I checked on power settings and they all set to Never and just started happening after push out the FortiClient.     Temporary fix for now is to shutdown the PC for a minute and power back on but that didn't totally solved the problem.  Is there a setting that we should look to?